/Engine/Source/Runtime/Engine/Public/MaterialShared.h
Get the array ofUTextureobjects for the expressions that in the layers of this stack. Can return nullptr objects for layers that don't holdUTexture2Dreferences.
void GetTextureValues ( const [FMaterialRenderContext](API\Runtime\Engine\FMaterialRenderContext) & Context, const [FUniformExpressionSet](API\Runtime\Engine\FUniformExpressionSet) & UniformExpressionSet, [UTexture](API\Runtime\Engine\Engine\UTexture) const ** OutValues ) const